Wrench.



STATES FFIQF.

WILLIAM RILEY, OF HENRY, SOUTH DAKOTA.

VIRENCH.

Application led February lll, 1917.

To all whom t may concern.' l l Be it known that l, WILLIAM RILEY, acitizen of the United States, residing at Henry, in the county ofCodington and` State of South Dakota, have' invented certain new anduseful Improvements in` l/Vrenches; and 'l Ahereby declare that thefollowing is a'full, clear, and exact description thereof, referencebeing had to the accompanying drawings, which form part of thisspecification.

This invention is a novel improvement in pipe and rod wrenches and theobject of the invention is to provide a simple, eilicient,

quick acting, powerful gripping wrench Jfrom the accompanying drawingsand the following description, and the essential features of the wrenchare summarized in the claims.

In said drawings:

Figure l is a side view of the wrench with the parts in normal position.

Fig. 2 is an enlarged view thereof showing it engaged with a pipe.

Fig. 3 is a detail.

The wrench comprises a handle l, main jaw 2, minor jaw 3, swinging links4 pivotally connecting jaws 2 and 3, swinging links 5 pivotallyconnecting aw 3 with the handle, and a spring 6 connected with thehandle and the main jaw.

As shown the main jaw 2 is approximately scythe or hook shaped, and isconnected at one end by a pivot bolt or rivet la to the adjacent end ofthe handle l. rlhe concave or inner edge of the jaw 2 is toothed orserrated as at 2a, and its point 2b lies almost at right angles to themain body of the jaw owing to the curvature thereof.

The minor jaw 3 is pivoted on a bolt or rivet 3c connected with the endsof swinging links Ll, the other ends of which links are pivoted by abolt or rivet 4a to the jaw 2 near its pivot la so that the minor jaw 3can have both a rocking motion on its pivot 3c relative to the jaw 2 andalso have a swinging motion on the pivot 4 relative Specification ofLetters Patent.

Patented oet. as, lair. serial No. 148,501. l

to jawA 2. l Theijaw 3 also has a curved portion 3a which is toothed orserrated on its convex face opposite the serrations 2at o' the main jaw.The minor jaw 3 has a shank 3b extending in rear of pivot 3C andconnected by a pin or rivet 3 to the ends of links 5 the other ends otlwhich links are pivoted by a bolt or pin 5 to the handle l, adjacent andin rear oit the pivot la.

rllhe minor vjaw 3 is provided with a fulcrum or abutment 3e which isadapted to engage a corresponding recess or. shoulder 2e in the jaw' 2and when so engaged this abutment transmits direct pressure romthe pointof engagement of the jaw 3 with the object to the point of engagement ofthe abutment with the aw 2 and largely relieves the links l and l5 fromstrain during the operation of the wrench.

r)The construction is such that if the jaw is swung relatively to handlel so as to move the major portion of the jaw toward a `position in linewith handle l, the jaws will open; but if jaw 2 is turned atan angle tothe handle 1 the jaws` will tend to close,l and engage a rod or pipe Pas indicated ,in Fig. 2;V and liii the parts are inthe position shown inFig. 2 the greater the downward pressure lexerted on handle 1 thegreater will be the bite of the jaw upon the pipe or rod.

A spring 6, preferably a helical spring, is connected at one end to thehandle l and its other cnd is connected to a bail 6a, the outer endsci"- which are shown as pivotally connected to the 2 by a pin 6b, thespring and bail forming a yielding connection between the handle and themain jaw 2; and the spring normally tending to swing the jaws to theposition shown in Fig. l, which is their normal idle position. Thespring 6 may be inclosed in a casing 6'3 of any desired construction,attached to or formed on the handle l, to protect it from injury.

Operation.

The wrench may be engaged with a pipe or rod by simply hooking the point2b of the main aw over or against the rod or pipe and then pullinglineally on the handle in a direction tending to move the jaw 2 intoline with the handle, which movement will cause the jaws to open untilthe wrench can be slipped into engagement with the rod or pipe asindicated in Fig. 2. The tension of the spring G will cause the jaws tobite the rod or pipe as soon as the lineal pull ceases. l/Vhen engagedwith an object a pull on the handle in the direction Vii'idicated by the'arrow in Fig. 2 will cause the jaws to lirmly bite the rod or pipe andcompel the latter to turn therewith. y

A very powerful grip is obtained by reason of the thrust of the links 5against the shank of the aw 3 tending to oscillate it on its pivot 8Cand fulcrum '3e and swing jaw 3 toward j aw 2.

A backward movement of: the handle l or a lineal pull thereon will causethe jaws to open and enable the wrench to be readily disengaged from therod or pipe.

ln using the wrench a large portion of the thrust exerted by the j aw 3on the rod is transmitted direct from the abutment V3" to the shoulder2e of the jaw 2 andconsequently the pivots of the links are relieved ofa great deal of strain. The wrenches are powerful, simple, easilyapplied, and may be made of `various sizes according to the sizes of-pipes and rods with which they are to be used.

VVhat l claim is:

1. ln a wrench the combination of a handle; :L main jaw pivotallyconnected with the handle; a minor jaw opposite the main jaw; linkspivotally connecting the minor jaw with the mam gaw; links pivotallyconnecting the shank of the minor Jaw with the handle; and a springconnected with the handle and main jaw, substantially as described.

2. In a wrench the combination of a handle, a main jaw pivotallyconnected with the handle and having a shoulder near its pivot, a minorjaw pi'votally connected with the main jaw, links pivotally connectingthe shank of the minor j aw and the handle; said minor jaw having anabutment adapted to engage the shoulder of the main jaw.

Sqln a wrench the combination of a handlc, a main aw pivotally connectedwith the handle, and a minor jaw having a shoulderf near its pivot, aminor jaw piyotally cnnected with the main jaw, links pivotally cori'-necting the 4shank of the minor j aw and the handle, said minor j awlia-ying an abutment adapted to' engage the -sl'ioulder of the-main jaw;and lai spring connected with the handle and the main jaw, substantiallyVas' deHK scribed. y

4. ln a wrench the combination of a han dle, a main jaw pivotallyconnected with the handle, a minor jaw opposite the main j aw, linkspiyotally connected with the minor aw and with the main jaw, linkspivotally connected withr the sha-nk of the minor jaw and the handle,said ina-in jaw having a shoulder near its pivot, and said rninor jawhaving an abutment lor"projection,adapted to engage the shoulder-ot' themain jaw; a spring connected with the handle and the main jaw,substantially as described. i

ln testimony that l claim the foregoing my own, l affix my signature.

WILLIAM RILEY.

Copies of this patent may be obtained for live cents each, 'byaddressing the Commissioner df `ate'nts,

Wasl'ington, D. C. f

